Exogenous steroid abuse is a cause of cardiovascular disease and virilization, typically in young males. Anabolic and androgenic steroids are abused by amateur and professional athletes alike. Exogenous steroid use can cause myocardial infarction, stroke, hyperlipidemia, acne, gynecomastia, gingival enlargement, testicular atrophy, and behavioral changes. Exogenous steroids commonly abused include testosterone esters and synthetic anabolic steroids such as nandrolone and stanozolol. Hypogonadism and depression may develop with abrupt discontinuation of steroids. Most effects of steroid abuse reverse after discontinuation, but balding, voice changes, and breast development are not always reversible.